The molecular formula of glucose:
C₆H₁₂O₆
Your answer is, all of the above.
<u>Chemical Change </u>
A chemical change occurs on the molecular level and produces a new substance. However, a physical change rearranges molecules and does not produce a new substance.
<u>10 examples of chemical changes</u>
- Burning of paper and log of wood
- Various metabolic reactions that take place in the cells
<u> Impacts of Chemical changes</u>
Anytime a new substance is made, a chemical change takes place. Usually two or more materials are combined and a new substance is formed. A chemical change can produce amazing explosions, like fireworks.
Thus, <u>all of the above</u> is the correct answer. Learn more about "Chemical Changes" here
brainly.com/question/24547616
Answer:
. 1. This amino acid has a positively charged R group: ARGININE
2. This amino acid has a negatively charged R group: ASPARTATE
3. This amino acid has a neutral polar R group: NONE
4. This amino acid has a nonpolar aliphatic R: VALINE
5. This amino acid has an aromatic R group: TRYTOPHAN
Explanation:
1) Arginine contains an extra amino group bearing a positive charge, in its chain which imparts basic properties to it
2) Aspartate contains an extra carboxyl group with a dissociable protron. Once the Protron is dissociated, it carries an extra negative charge in its side chain (R)
3) NONE of the amino acids given belong to this group because amino acids with neutral polar R groups contain functional groups that form hydrogen bonds with water. But, this is not the case with tryptophan aspartate valine or arginine
4) Valine has a R group that is hydrocarbon in nature and thus hydrophobic.
5) Trytophan has a benzene ring in its side chain
Answer:
929 mg of MnO₂ should be added to excess HCl, in order to obtain 385 mL of Cl₂
Explanation:
The reaction states:
MnO₂ (s) + 4 HCl (aq) → MnCl₂(aq) + 2H₂O (l) + Cl₂(g)
First of all we need the moles of produced chlorine. We can find it out by the Ideal Gases Law → P . V = n . R . T
- We need to convert the 795 Torr to atm → 795 Torr . 1 atm / 760 Torr = 1.05 atm
- We need to convert the 385 mL to L → 385 mL . 1L / 1000mL = 0.385L
- We need T° K = 25°C + 273 = 298K
1.05 atm . 0.385L = n . 0.082 . 298K
n = 1.05 atm . 0.385L / 0.082 . 298K → 0.0165 moles of Cl₂
Ratio is 1:1. 1 mol of chlorine gas can be made by 1 mol of MnO₂
Therefore, If I produced 0.0165 moles of Cl₂ I definitely used 0.0165 moles of MnO₂
We convert the moles to mass → 0.0165 mol . 86.94 / 1 mol = 1.43 g
We can convert the g to mg → 1.43 g . 1000 mg / 1g = 1430 mg
